Measuring instrument.



No. 730,742. PATENTED JUNE 9,1903.

- J. J. BYRNE.

:MEASURING INSTRUMENT.

. APPLICATION FILED JAN. 26. 1903.

N0 MODEL.

Fatented June 9, 1909;.

I 'FFIcEI.

PATENT JOHN J. BYRNE, OF CHICAGO, ILLINOIS.

MEASQRING INSTRUMENT.

SPECIFICATION forming part of Letters Patent No. 730,742, dated June 9,1903.

Application filed January 26, 1903- Serial No. 140366. (No model.)

To all whom, it nuty concern:

Be it known that I, JOHN J. BYRNE, a citizen of the United States ofAmerica, and a resident of Chicago, in the county of Cook and" preciseand at the same time ample range of local adjustment to the scriber orpointer rod in the operation of the final and accurate adjustment oftheinstrument and in which a single master clamping means is adapted tosecure the various movable parts of the mechanism at the requiredadjustmentin a simul-' ianeous, substantial, and convenient manner, allas will hereinafter more fully appear, and be more particularly pointedout in the claims.

In the accompanying drawings, illustrative of the present invention,Figure 1 is a side elevation illustrating the present mechanism appliedto a trammel-beam; Fig. 2, a similar View, partly in section,illustrating the application of the same to the stand of a surfacegage;Fig. 3, an enlarged sectional elevation atline 0050, Fig. 4, of the clamping and scriberadjusting mechanism of the present improvement; Fig. 4,a transverse section of the same at line w 00, Fig. 8; Fig. 5, asectional elevation of the same on line w 00, Fig. at; Fig. 6, adetached plan view of the longitudinally. slitted holding-sleevefor thescriber-rod.

Similar numerals of reference indicate like parts in the several views.

Referring to the drawings, 1 represents a straight beam or post, whichin the preferred form of the present invention is of a square form incross-section or of any other usual non-circular form; Such beam or postmay have any required length and be made sectional, if required, and isadapted to form the beam portion of a machinists trammel, as illustratedin Fig. l, or the vertical post of a machinists surface-gage, asillustrated in Fig. 2. For such lastmentioned use said beam or post willhave a screw-threaded end 3, adapted to screw into a correspondingorifice in a supporting foot or base, and which screw-threaded end isalso adapted to additionally constitute a part of a coupling with acorrespondingly-formed beam or post section where an extended beam orpost is desired. For the first-mentioned use as a machinists tram melthe beam or post 1 will have a transverse orifice at its other end forthe passage of scriber-rod or trammel-point at and with a screw-threadedextension for the reception of the clamping-nut 5 and the interposedbinding-washer 6, as shown in Fig. 1, and by means of which thetrammel-point 4 .is firmly clamped at any required adjustment in thetransverse orifice aforesaid.

7 is the supporting foot or base, having any usual and approved form andinto which the beam or post 1 is screwed or otherwise secured in avertical position, as illustrated in Fig. 2.

8 is a clip-block, preferably of a disk shape and formed with a smoothbearing-surface on one side, saddle-legs 9 on the opposite side toengage the side of the beam or post 1, and with a central bore for thepassage of the shank of the clamping-head, hereinafter described.

10 is a clamping-head formedwith-a-transverse orifice for the passageand reception of the non-circular beam or post 1 and adapted in itsnormal operation to draw against the side of said beam or post andfirmly clamp the same against the adjacent faces of the saddle-lugs 9 ofthe clip-block 8 to secure the described parts in fixed relation to eachother, as hereinafter more fully described.

11 is a tubular extension-shank on the clamping-head 10, which occupiesthe central orifice of the clip-bar 8 aforesaid and formed with aninternal screw-thread, as shown.

12 12 are two counterpart jaw-plates arranged in substantiallyclose-relation and provided with transverse orifices, through which theaforesaid tubular shank ll of the clamping-head 10 passes to maintainsaid plates in proper position with relation to the other parts of themechanism.

- 12 is a steady-pin holding the jaw-plates from independent turningmovement one upon the other.

. 13 is a washer fitting the free endof the (u-- bular shank 11, so asto slide freely thereon, but held from independent turning movement withrelation thereto by a spline 14 on one part fitting a longitudinalgroove in the other part, as shown in Fig. 6 of the drawings,-or by anyother well-known and equivalent connection. Such washer 13 has bearingagainst the outermost jaw-plate 12 and is preferably seated in a shallowrecess in the face of the same, as shown in Fig. 4.

15 is a clamping-screw, the headed portion of which has abutment againstthe outer surface of the washer 13,while its screw-threaded shankportion screws into the screw-threaded bore of the shank extension 11 ofthe clamping-head 10, the construction being such that with a turningmovement of said clampingscrew in one direction all of the describedparts will be clamped together in a substantially simultaneous manner,and with a turning movement in the opposite direction a correspondingrelease of the parts will be effected.

16 is a longitudinally-divided sleeve fitting and turning in a circularbearing formed therefor in the opposed faces of the counterpart jaws 1212 and to one side of the central orifices in said plates for thepassage of the extension-shank 11, heretofore described.

17 is a hand-lever or thumb-wing by which a rotative adjustment of thesleeve 16 is effected when desired.

18 and 19 are end collars on the sleeve 16 to prevent endwise movementof the same in its beari ng between the jaw-plates 12 12 aforesaid.

20 is a bore in the sleeve 16 and which in the preferred form of thepresent invention as illustrated in Figs. 1 and 3 of the drawings isformed by a hole or orifice formed in said sleeve in a line oblique tothe longitudinal axis thereof.

21 is a scriber or pointer rod of any usual form, fitting the obliquebore 20 aforesaid.

YVith the described construction of the sleeve 16 a short turningmovement of the same, owing to the oblique manner in which the scriberor pointer rod 21 is held thereby, will cause the point of said scriberor pointer rod to move in a circular or gyratory path and with a veryconsiderable range of adjustment and which range will depend upon thedistance the point of said scriber is away from said scriber-holdingsleeve 16. With the improved arrangement of parts shown in the drawingsthe scriber-rod 21 and the holding-sleeve 16 are clamped and held totheir adjustment through the instrumentality of the main clamping-screw15, and by such means the manipulation of the mechanism is greatlysimplified and made very convenient.

It is within the province of the present invention to make the beamorpost 1 circular in cross-section,with a corresponding formation of-theclamping-faces of the clip-block 8 and the clamping-head 10 where anyspecial requirement may call for such change.

Having thus fully described my said inven tion, what I claim as new, anddesire to secure by Letters Patent, is

1. In a measuring instrument of the character herein described, thecombination of a beam or post, a pair of counterpart jawplates formedwith a circular bearing in their opposed faces,a longitudinally-dividedsleeve fitted in said bearing, a scriber-rod held by said sleeve in aposition eccentric to the axis of the bearing, and means for adjustablyconnecting said jaw-plates to the beam or post, substantially as setfort-h.

2. In a measuring instrument of the character herein described, thecombination of a beam or post, a pair of counterpart jawplates formedwith a circular bearing in their opposed faces,alongitudinally-dividedsleeve fitted in said bearing and provided with an eccentric bore formedby an orifice in said sleeve oblique to the longitudinal axis of thesame, a scriber rod fitting said here, and means for adjustablyconnecting said jawplates to the beam or post, substantially as setforth.

3. In a measuring instrument of the character herein described, thecombination of a beam or post non-circular in cross-section, a pair ofcounterpart jaw-blades formed with a circular bearing in their opposedfaces, a 1011- gitudinally-divided sleeve fitted in said hearing, ascriber-rod held by said sleeve in a position eccentric to the axis ofthe bearing, and means for adjustably connecting said jawplates to thebeam or post, substantially as set forth.

4. In a measuring instrument of the character herein described, thecombination of a beam or post non-circular in cross-section, a

pair of counterpart jaw-platesformed with a circular bearing in theiropposed faces, a longitudinally-divided sleeve fitted in said hearingand provided with a bore formed oblique to the axis of the bearing, ascriber-rod fitting said bore, and means for adjustably connecting saidjaw-plates to the beam or post, substantially as set forth.

'5. In a measuring instrument of the character herein described, thecombination of a beam or post non-circular in cross-section and formedwith a circular bearing in their opposed faces, a longitudinally-dividedsleeve fitted in said bearing and provided with a bore formed oblique tothe axis of the bearing, a scriber-rod fitting said bore, and means foradjustably connecting said jaw-plates to the beam or post, substantiallyas set forth.

7. In a measuring instrument of the character herein described, thecombination of a beam or post non-circular in cross-section, means forsecuring a scriber-rod at one end of the same, a pair of counterpartjaw-plates formed with a circular bearing in their opposed faces, alongitudinally-divided sleex e fitted in said bearing, a scriber-rodheld by said sleeve in a position eccentric to the axis of the bearing,and means for adjustably connecting said jaw-plates to the beam or post,substantially as set forth.

8. In a measuring instrument of the character herein described, thecombination of a beam or post non-circular in cross-section, means forsecuring a scriber-rod at one end of the same, a pair of counterpartjaw-plates formed with a circular bearing in their opposed faces, alongitudinally-divided sleeve fitted in said bearing and provided with abore formed oblique to the axis of the bearing, a scriber-rod fittingsaid bore, and means for adjustably connecting said jaw-plates to thebeam or post, substantially as set forth.

9. In a measuring instrument of the character herein described, thecombination of a beam or post non-circular in cross-section, means forsecuring a scriber-rod at one end of the same comprising a transverseorifice in the end of the beam, a screw-threaded extension on said end,an interposed Washer and clamping-nut on said extension, a pair ofcounterpart jaw-plates formed with a circular bearing in their opposedfaces, a longitudinally-divided sleeve fitted in said bearing, ascriber-rod held by said sleeve in a position eccentric to the axis ofthe bearing, and means for adjustably connecting said jaw-plates to thebeam or post, substantially as set forth.

10. In a measuring instrument of the character herein described, thecombination of a beam or post non-circular in cross-section, means forsecuring a scriber-rod at one end of the same comprising a transverseorifice in the end of the beam, a screw-threaded extension on said end,an interposed Washer and clamping-nut on said extension, a pair ofcounterpart jaw-plates formed with a circular bearing in their opposedfaces, a longitudinally-divided sleeve fitted in said bearing andprovided with a bore formed oblique to the axis of the bearing, ascriber-rod fitting said bore, and means for adjustably connecting saidjaw-plates to the beam or post, substantially as set forth.

11. In a measuringinstrument of the character herein described, thecombination of a beam or post, a clip-block arranged at one sideof thesame, a pair of counterpart jawplates arranged at the side of theclip-block and provided with a circular bearing in their opposed faces,an orificed clamping-head engaging said beam or post and provided with ashank extension passing through the clipblock and jaw-plates aforesaid,a clamping means engaging said shank extension, a longitudinally-dividedsleeve arranged in the circular bearing of the jaw-plates, and ascriber-rod held by said sleeve in a position eccentric to the axis ofthe bearing, substantially as set forth.

12. In a measuring instrument of the character herein described, thecombination of a beam or post, a clip-block arranged at one side of thesame, a pair of counterpart jawplates arranged at the side of theclip-block and provided with a circular bearing in their opposed faces,an orificed clamping-head engaging said beam or post and provided with ashank extension passing through the clipblock and jaw-plates aforesaid,a clamping means engaging said shank extension, a longitudinally-dividedsleeve arranged in the circular bearing of the jaw-plates and providedwith a bore formed oblique to the axis of the bearing, and a scriber-rodfitting said bore, substantially as set forth.

13. In a measuring instrument of the character herein described, thecombination of a beam or post, a clip-block arranged at one side of thesame, a pair of counterpart jawplates arranged at the side of theclip-block and provided with a circular bearing in their opposed faces,an orificed clamping-head engaging said beam-or post and provided with ashank extension passing through the clipblock and jaw-plates aforesaid,a clampingscrew engaging in a screw-threaded recessin said shankextension, a longitudinally -divided sleeve arranged in the circularbearing of the jaw-plates, and a scriber-rod held by said sleeve in aposition eccentric to the axis of-the bearing, substantially as setforth.

14:. In a measuring instrument of the character herein described, thecombination of a beam or post, a clip-block arranged at one side of thesame, a pair of counterpart jawplates arranged at the side of theclip-block and provided with a circular bearing in their opposed faces,an orificed clamping-head engaging said beam or post and provided with ashank extension passing through the clipblock and jaw-plates aforesaid,a clampingscrew engaging in a screw-threaded recess in said shankextension, a longitudinally-divided sleeve arranged in the circularbearing of the jaw-plates and provided with a bore formed oblique to theaxis of the bearing, and a scriber-point fitting said bore,substantially as set forth.

15. In a measuring instrument of the character herein described, thecombination of a beam or post, a clip-block arranged at one side of thesame, a pair ofcounterpart jawplates arranged at the side of theclip-block and provided with a circular bearing in their opposed faces,an orificed clamping-head engaging said beam or post and provided with ashank extensionv passing through the clipblock and jaw-plates aforesaid,a clampingscrew engaging in a screw-threaded recess in said shankextension, an interposed washer held from independent rotation on saidextension, a longitudinally-divided sleeve arranged in the circularbearing of the jawplates, and a scriber-rod held by said sleeve in aposition eccentric to the axis of the hearing, substantially as setforth.

16. In a measuring instrument of the character herein described, thecombination of a beam or post, a clip-block arranged at one side of thesame, a pair of counterpart jawplates arranged at the side of theclip-block and provided with a circular bearing in their respectivefaces, an orificed clamping-head engaging said beam or post and providedwith a shank extension passing through the clipblock and jaw-platesaforesaid, a clampingscrew engaging in a screw-threaded recess in saidshank extension, an interposed washer held from independent rotation onsaid extension, a longitudinally-divided sleeve arranged in the circularbearing of the jawplates and provided with a bore formed oblique to theaxis of the bearing, and ascriberpoint fitting said bore, substantiallyas set forth.

Signed at Chicago, Illinois, this 21st day of January, 1903.

JOHN J. BYRNE.

Witnesses:

ROBERT BURNS, HENRY A. Now.

